To reveal the transient temperature distribution pattern inside the magnetorheological grease (MRG) torsional vibration damper and explore the relationship between the current and internal temperature of the device, the transient temperature simulation analysis of the MRG device was conducted in this study. Firstly, a theoretical heat transfer model of MRG torsional vibration damper with dual heat source structural feature was established based on the Bingham constitutive model and the temperature-dependent viscosity characteristic of MRG. Then, the transient temperature field model of the MRG torsional vibration damper was developed by the finite element method, the temperature field distribution and temperature–time variation characteristics of the MRG torsional vibration damper at 0A, 1A, and 2A working conditions were analyzed, and the effects of viscosity and slip factors on the temperature rise of the device were investigated. The simulation results show that the temperature rise of MRG in the working domain is the fastest, but a gradual slowing of the temperature rise rate. The magnitude and rate of temperature rise are maximum when the 1A current is applied to the torsional vibration damper. Finally, the current–temperature curve is obtained by fitting the simulation results. The results of the analysis reveal the internal temperature distribution and temperature rise characteristics of the torsional vibration damper, which provide a theoretical basis for the structural optimization and control strategy design of the MRG torsional vibration damper considering temperature as a factor.

为揭示磁流变润滑脂（MRG）扭振阻尼器内部的瞬态温度分布规律，探索电流与装置内部温度的关系，本研究对MRG装置进行了瞬态温度模拟分析。首先，基于Bingham本构模型和MRG随温度变化的粘度特性，建立了具有双热源结构特征的MRG扭振阻尼器的理论传热模型。然后，利用有限元方法建立了MRG扭振阻尼器的瞬态温度场模型，分析了MRG扭振阻尼器在0A、1A和2A工况下的温度场分布和温度-时间变化特性，研究了粘度和滑移因子对装置温升的影响。仿真结果表明，MRG在工作域的温升最快，但温升速度逐渐放缓。扭振减振器通入 1A 电流时，温升的幅度和速度最大。最后，通过拟合仿真结果得到电流-温度曲线。分析结果揭示了扭振阻尼器的内部温度分布和温升特性，为MRG扭振阻尼器考虑温度的结构优化和控制策略设计提供了理论依据。